Document Title: =============== T Mobile Business - CS Cross Site Scripting Vulnerability References (Source): ==================== Release Date: ============= 2015-08-10 Vulnerability Laboratory ID (VL-ID): ==================================== 1566 Common Vulnerability Scoring System: ==================================== 2.5 Product & Service Introduction: =============================== T-Mobile International AG is a German holding company for Deutsche Telekom AG\\\'s various mobile communications subsidiaries outside Germany. Based in Bonn, Germany, its subsidiaries operates GSM, UMTS and LTE-based cellular networks in Europe, the United States, Puerto Rico, and the U.S. Virgin Islands. The company has financial stakes in mobile operators in both Central and Eastern Europe. Abstract Advisory Information: ============================== An independent vulnerability laboratory researcher discovered a client-side cross site scripting web vulnerability in the official T-Mobile online service web-application. Vulnerability Disclosure Timeline: ================================== 2015-07-22: Researcher Notification (Murat Yilmazlar) 2015-07-29: Vendor Response/Feedback ( T-Mobile Security Team - Bug Bounty Team) 2015-08-10: Public Disclosure (Vulnerability Laboratory) Discovery Status: ================= Published Exploitation Technique: ======================= Remote Severity Level: =============== Medium Technical Details & Description: ================================ A non persistent cross site scripting web vulnerability has been discovered in the official T-Mobile Business online service web-application. The vulnerability allows remote attackers to hijack website customer, moderator or admin sessions data by client-side manipulated cross site requests. The vulnerability is located in the controller parameter Primary&Ntt of the search module. Remote attackers are able to inject script code to manipulate client-side application to browser requests. The request method to inject is GET and the attack vector is located on the client-side of the online-service. The security risk of the client-side cross site web vulnerability is estimated as medium with a cvss (common vulnerability scoring system) count of 2.5. Exploitation of the client-side cross site scripting web vulnerability requires no privilege web application user account and low or medium user interaction. Successful exploitation results in client-side account theft by hijacking, client-side phishing, client-side external redirects and non-persistent manipulation of affected or connected service modules. Request Method(s): [+] GET Vulnerable Domain(s): [+] Vulnerable Module(s): [+] Controller Vulnerable File(s): [+] 10001&Ntk Vulnerable Parameter(s): [+] Primary&Ntt Proof of Concept (PoC): ======================= The vulnerability can be exploited by remote attackers without privilege web-application user account and with low or medium user interaction. For security demonstration or to reproduce the vulnerability follow the provided information and steps below to continue. PoC: ';alert(String.fromCharCode(88,83,83))//';alert(String.fromCharCode(88,83,83))//";alert(String.fromCharCode(88,83,83))//"; alert(String.fromCharCode(88,83,83))//-->">'> PoC Image: Solution - Fix & Patch: ======================= The vulnerability has been fixed/patched by the T-Mobile security team since 30th August 2015. Security Risk: ============== The security risk of the client-side cross site scripting web vulnerability in the t-mobile search module is estimated as medium. 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